The Doctor: I've seen bigger. Clara: Really? The Doctor: Are you joking? It's massive!
The great seats of power tend to be wide and open, not vertical and soaring. Red Square, Tiananmen Square, the Brandenburg Gate in Berlin - all massive but with large open spaces that project an image of might.
Of course Pluto is a planet: It's massive enough to have its shape controlled by gravity rather than material strength, which is the hallmark of planethood.
I've seen massive changes in Ireland in my lifetime.
You don't have to start from scratch to have a massive impact on the world.
I am a weapon of massive consumption
My head is massive. My head is, like, off the charts.